First, the Bluetooth module of the mobile phone is too old, which generally appears on the old mobile phone. For example, the mobile phone bought three years ago is not the latest, its compatibility is a little poor, and it is basically easy to get rid of the connection and no response. First turn on Bluetooth, and then manually delete all connected Bluetooth devices after all available devices are displayed. Turn off Bluetooth, turn it on again, click Xiaomi Wear APP and connect the bracelet. Second, it better solves the problem that the permissions of the mobile phone are not opened, and the connection does not respond only because some permissions in the mobile phone are not opened. The reminder function and some display functions worn by Xiaomi need self-starting service support, so it must be turned on, otherwise it will still affect the use. Take Xiaomi mobile phone as an example, just open Security Center-Usage Management-Xiaomi Wear and turn on "Self-Start". The same is true for other mobile phones.